The conductive magnetic film will produce eddy current loss when it works in a high-frequency band, which will reduce the performance of bulk acoustic wave magnetoelectric (BAW ME) devices. If the eddy current loss is not taken into account in the devices modeling, the models will be seriously distorted. Therefore, combining the Maxwell's equations with constitutive relations of ME material, we define the eddy current loss angle as a figure of merit to evaluate the eddy current loss. Then the models of eddy current loss rate of the potential energy and average radiated power are constructed, respectively. The finite element analysis is used to further validate the analytic model. In addition, the effect of isolation layers on eddy current suppression is studied by using the analytical model. The results show that the analytical solutions match with the numerical simulation results perfectly.

中文翻译：

---

BAW 磁电器件涡流损耗的建模和抑制


导电磁性薄膜工作在高频段时会产生涡流损耗，从而降低体声波磁电（BAW ME）器件的性能。如果器件建模时不考虑涡流损耗，模型将会严重失真。因此，结合麦克斯韦方程组和ME材料的本构关系，我们将涡流损耗角定义为评估涡流损耗的品质因数。然后分别建立了涡流势能损失率和平均辐射功率模型。有限元分析用于进一步验证解析模型。此外，利用解析模型研究了隔离层对涡流抑制的影响。结果表明解析解与数值模拟结果吻合良好。